QLiS – development of a schizophrenia-specific quality-of-life scale
<p>Abstract</p> <p>Background</p> <p>The aim of the project was to develop an instrument for the assessment of subjective quality of life specific to schizophrenic persons on the basis of patients’ views on their own life and on sound psychometric principles.</p>...
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| Format: | Article |
| Language: | English |
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BMC
2012-06-01
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| Series: | Health and Quality of Life Outcomes |
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| Online Access: | http://www.hqlo.com/content/10/1/61 |
| _version_ | 1818001133587660800 |
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| author | Franz Michael Fritz Michael Gallhofer Bernd Meyer Thorsten |
| author_facet | Franz Michael Fritz Michael Gallhofer Bernd Meyer Thorsten |
| author_sort | Franz Michael |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Background</p> <p>The aim of the project was to develop an instrument for the assessment of subjective quality of life specific to schizophrenic persons on the basis of patients’ views on their own life and on sound psychometric principles.</p> <p>Methods</p> <p>The project applied a six-step multiphase development process with six distinct studies. (1) The elicitation of schizophrenic persons’ views on their quality of life was based on open-ended interviews with interviewees from different settings (acute ward inpatients, long-term care patients, community care patients; n = 268). (2) A cross-sectional study with schizophrenic and healthy persons was conducted to quantify the relative importance of the various aspect of quality of life that emerged from the qualitative study (n = 143). (3) We conducted an empirical comparison of response formats with schizophrenic persons (n = 32). (4) A scale construction- and reliability-testing study was performed (n = 203) as well as (5) a test-retest reliability study (n = 49). (6) The final questionnaire (QLiS, quality of life in schizophrenia) was tested in an additional study on convergent and discriminant validity (n = 135).</p> <p>Results</p> <p>The QLiS comprises 52 items (plus 2 optional items related to work) in 12 subscales: social contacts, appreciation by others, relationship to family, appraisal of pharmacotherapy, appraisal of psychopathological symptoms, cognitive functioning, abilities to manage daily living, appraisal of accommodation/housing, financial situation, leading a ’normal‘ life, confidence, general life-satisfaction. An item response format with four response categories was preferred by the schizophrenic persons. The mean values of the subscales clustered around the theoretical mean of the subscales and only minimal ceiling effects were found. The reliability (test-retest-reliability and internal consistency) was with one exception > .70 for all subscales.</p> <p>Conclusion</p> <p>Taking the low numbers of items per subscale into account, the QLiS can be regarded as an accurate assessment instrument of subjective quality of life in schizophrenia with good content validity.</p> |
| first_indexed | 2024-04-14T03:30:42Z |
| format | Article |
| id | doaj.art-10337a08e6d54066ac3b8036da6743d5 |
| institution | Directory Open Access Journal |
| issn | 1477-7525 |
| language | English |
| last_indexed | 2024-04-14T03:30:42Z |
| publishDate | 2012-06-01 |
| publisher | BMC |
| record_format | Article |
| series | Health and Quality of Life Outcomes |
| spelling | doaj.art-10337a08e6d54066ac3b8036da6743d52022-12-22T02:14:58ZengBMCHealth and Quality of Life Outcomes1477-75252012-06-011016110.1186/1477-7525-10-61QLiS – development of a schizophrenia-specific quality-of-life scaleFranz MichaelFritz MichaelGallhofer BerndMeyer Thorsten<p>Abstract</p> <p>Background</p> <p>The aim of the project was to develop an instrument for the assessment of subjective quality of life specific to schizophrenic persons on the basis of patients’ views on their own life and on sound psychometric principles.</p> <p>Methods</p> <p>The project applied a six-step multiphase development process with six distinct studies. (1) The elicitation of schizophrenic persons’ views on their quality of life was based on open-ended interviews with interviewees from different settings (acute ward inpatients, long-term care patients, community care patients; n = 268). (2) A cross-sectional study with schizophrenic and healthy persons was conducted to quantify the relative importance of the various aspect of quality of life that emerged from the qualitative study (n = 143). (3) We conducted an empirical comparison of response formats with schizophrenic persons (n = 32). (4) A scale construction- and reliability-testing study was performed (n = 203) as well as (5) a test-retest reliability study (n = 49). (6) The final questionnaire (QLiS, quality of life in schizophrenia) was tested in an additional study on convergent and discriminant validity (n = 135).</p> <p>Results</p> <p>The QLiS comprises 52 items (plus 2 optional items related to work) in 12 subscales: social contacts, appreciation by others, relationship to family, appraisal of pharmacotherapy, appraisal of psychopathological symptoms, cognitive functioning, abilities to manage daily living, appraisal of accommodation/housing, financial situation, leading a ’normal‘ life, confidence, general life-satisfaction. An item response format with four response categories was preferred by the schizophrenic persons. The mean values of the subscales clustered around the theoretical mean of the subscales and only minimal ceiling effects were found. The reliability (test-retest-reliability and internal consistency) was with one exception > .70 for all subscales.</p> <p>Conclusion</p> <p>Taking the low numbers of items per subscale into account, the QLiS can be regarded as an accurate assessment instrument of subjective quality of life in schizophrenia with good content validity.</p>http://www.hqlo.com/content/10/1/61Quality of lifePersonal satisfactionSchizophreniaQuestionnairesOutcome assessment |
| spellingShingle | Franz Michael Fritz Michael Gallhofer Bernd Meyer Thorsten QLiS – development of a schizophrenia-specific quality-of-life scale Health and Quality of Life Outcomes Quality of life Personal satisfaction Schizophrenia Questionnaires Outcome assessment |
| title | QLiS – development of a schizophrenia-specific quality-of-life scale |
| title_full | QLiS – development of a schizophrenia-specific quality-of-life scale |
| title_fullStr | QLiS – development of a schizophrenia-specific quality-of-life scale |
| title_full_unstemmed | QLiS – development of a schizophrenia-specific quality-of-life scale |
| title_short | QLiS – development of a schizophrenia-specific quality-of-life scale |
| title_sort | qlis development of a schizophrenia specific quality of life scale |
| topic | Quality of life Personal satisfaction Schizophrenia Questionnaires Outcome assessment |
| url | http://www.hqlo.com/content/10/1/61 |
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